Sean Patrick Buckley

CIK: 0001865116

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)18 (60.0%)

Position reduction

Option Exercises (M)2 (6.7%)

Derivative conversions

Awards (A)2 (6.7%)

Compensation grants

Other (G, F, J, C, D, …)8 (26.7%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

MGNI

MAGNITE, INC.

Officer

Discretionary Trading P&L

Holdings

Transaction History (30 total)

MGNI
MAGNITE, INC.
Aug 18, 2026
Sale(S)
Direct
2.8K shares at avg. $25.00$69K
MGNI
MAGNITE, INC.
Aug 17, 2026
Sale(S)
Direct
8.3K shares at avg. $24.31$201K
MGNI
MAGNITE, INC.
Aug 15, 2026
Tax Payment(F)
Direct
11.7K shares at avg. $24.73$290K
MGNI
MAGNITE, INC.
Aug 6, 2026
Exercise(M)
Direct
28.7K shares at avg. $13.90$399K
MGNI
MAGNITE, INC.
Aug 6, 2026
Sale(S)
Direct
47.9K shares at avg. $25.09$1.2M
MGNI
MAGNITE, INC.
Aug 6, 2026
Sale(S)
Direct
19.2K shares at avg. $23.00$442K
MGNI
MAGNITE, INC.
Jul 7, 2026
Sale(S)
Direct
19.2K shares at avg. $21.03$404K
MGNI
MAGNITE, INC.
Jun 17, 2026
Sale(S)
Direct
19.2K shares at avg. $19.00$365K
MGNI
MAGNITE, INC.
May 15, 2026
Tax Payment(F)
Direct
12K shares at avg. $12.82$154K
MGNI
MAGNITE, INC.
Feb 15, 2026
Tax Payment(F)
Direct
26.9K shares at avg. $11.70$315K
MGNI
MAGNITE, INC.
Jan 9, 2026
Tax Payment(F)
Direct
30.4K shares at avg. $16.17$491K
MGNI
MAGNITE, INC.
Jan 9, 2026
Exercise(M)
Direct
64.1K shares-
MGNI
MAGNITE, INC.
Jan 1, 2026
Award(A)
Direct
127.3K shares-
MGNI
MAGNITE, INC.
Nov 24, 2025
Sale(S)
Direct
2.2K shares at avg. $14.50$32K
MGNI
MAGNITE, INC.
Nov 18, 2025
Sale(S)
Direct
4.4K shares at avg. $13.36$59K
MGNI
MAGNITE, INC.
Nov 15, 2025
Tax Payment(F)
Direct
11.6K shares at avg. $14.15$165K
MGNI
MAGNITE, INC.
Sep 9, 2025
Sale(S)
Direct
20K shares at avg. $24.61$492K
MGNI
MAGNITE, INC.
Sep 8, 2025
Sale(S)
Direct
20K shares at avg. $25.56$511K
MGNI
MAGNITE, INC.
Aug 19, 2025
Sale(S)
Direct
9.3K shares at avg. $23.42$218K
MGNI
MAGNITE, INC.
Aug 18, 2025
Sale(S)
Direct
10.9K shares at avg. $23.85$260K
MGNI
MAGNITE, INC.
May 16, 2025
Sale(S)
Direct
9.7K shares at avg. $15.73$152K
MGNI
MAGNITE, INC.
May 15, 2025
Tax Payment(F)
Direct
15K shares at avg. $15.88$239K
MGNI
MAGNITE, INC.
Feb 19, 2025
Sale(S)
Direct
10.5K shares at avg. $19.13$201K
MGNI
MAGNITE, INC.
Feb 15, 2025
Tax Payment(F)
Direct
27.4K shares at avg. $20.00$549K
MGNI
MAGNITE, INC.
Feb 7, 2025
Sale(S)
Direct
18.7K shares at avg. $20.00$374K

		Type	Shares	Price		Ownership
Aug 18, 2026	MGNI MAGNITE, INC.	Sale(S)	2,759	$25.00	$68,975	Direct
Aug 17, 2026	MGNI MAGNITE, INC.	Sale(S)	8,271	$24.31	$201,068	Direct
Aug 15, 2026	MGNI MAGNITE, INC.	Tax Payment(F)	11,715	$24.73	$289,712	Direct
Aug 6, 2026	MGNI MAGNITE, INC.	Exercise(M)	28,703	$13.90	$398,972	Direct
Aug 6, 2026	MGNI MAGNITE, INC.	Sale(S)	47,942	$25.09	$1,202,865	Direct
Aug 6, 2026	MGNI MAGNITE, INC.	Sale(S)	19,237	$23.00	$442,451	Direct
Jul 7, 2026	MGNI MAGNITE, INC.	Sale(S)	19,233	$21.03	$404,470	Direct
Jun 17, 2026	MGNI MAGNITE, INC.	Sale(S)	19,233	$19.00	$365,427	Direct
May 15, 2026	MGNI MAGNITE, INC.	Tax Payment(F)	12,019	$12.82	$154,084	Direct
Feb 15, 2026	MGNI MAGNITE, INC.	Tax Payment(F)	26,942	$11.70	$315,221	Direct
Jan 9, 2026	MGNI MAGNITE, INC.	Tax Payment(F)	30,369	$16.17	$491,067	Direct
Jan 9, 2026	MGNI MAGNITE, INC.	Exercise(M)	64,125	-	$0	Direct
Jan 1, 2026	MGNI MAGNITE, INC.	Award(A)	127,273	-	$0	Direct
Nov 24, 2025	MGNI MAGNITE, INC.	Sale(S)	2,213	$14.50	$32,089	Direct
Nov 18, 2025	MGNI MAGNITE, INC.	Sale(S)	4,426	$13.36	$59,131	Direct
Nov 15, 2025	MGNI MAGNITE, INC.	Tax Payment(F)	11,642	$14.15	$164,734	Direct
Sep 9, 2025	MGNI MAGNITE, INC.	Sale(S)	20,000	$24.61	$492,200	Direct
Sep 8, 2025	MGNI MAGNITE, INC.	Sale(S)	20,000	$25.56	$511,200	Direct
Aug 19, 2025	MGNI MAGNITE, INC.	Sale(S)	9,315	$23.42	$218,157	Direct
Aug 18, 2025	MGNI MAGNITE, INC.	Sale(S)	10,886	$23.85	$259,631	Direct
May 16, 2025	MGNI MAGNITE, INC.	Sale(S)	9,692	$15.73	$152,455	Direct
May 15, 2025	MGNI MAGNITE, INC.	Tax Payment(F)	15,049	$15.88	$238,978	Direct
Feb 19, 2025	MGNI MAGNITE, INC.	Sale(S)	10,527	$19.13	$201,382	Direct
Feb 15, 2025	MGNI MAGNITE, INC.	Tax Payment(F)	27,444	$20.00	$548,880	Direct
Feb 7, 2025	MGNI MAGNITE, INC.	Sale(S)	18,693	$20.00	$373,860	Direct

1-25 of 30 transactions

About Buckley Sean Patrick

Buckley Sean Patrick (SEC CIK 0001865116) files insider reports with the SEC as Officer of MAGNITE, INC. (MGNI).

Signal8 holds 19 ownership filings by Buckley Sean Patrick, all Form 4s, filed between Nov 13, 2024 and Aug 18, 2026. Those filings report 30 transactions, from Nov 11, 2024 to Aug 18, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Buckley Sean Patrick's filings is in NEW YORK, NY.

Recent filings by Buckley Sean Patrick

Aug 18, 2026: Open-market sale of MGNI shares (Form 4, code S).
Aug 17, 2026: Open-market sale of MGNI shares (Form 4, code S).
Aug 15, 2026: Tax withholding of MGNI shares (Form 4, code F).
Aug 6, 2026: Option exercise of MGNI shares (Form 4, code M).
Aug 6, 2026: Open-market sales of MGNI shares (2 lines, Form 4, code S).

Other insiders filing for MAGNITE, INC. (MGNI)

Caine Paul, Director
Sullivan Haas, CHIEF ACCOUNTING OFFICER
Gephart Brian, CHIEF FINANCIAL OFFICER
Knopper Douglas S, Director
Buonasera David, CHIEF TECHNOLOGY OFFICER
Spillane Robert F, Director

How to read Form 4 transaction codes